Spinner for paper containers



Dec. 20, 1932. I A, B D R 1,891,866

SPINNER FOR PAPER CONTAINERS Original Filed Sept. 26, 1929 I 7 Illl fizz/517ml AHM'EZZ! Dudar Patented Dec. 20, 1932 v UNITED STATES PATENT OFFICE ANDREW BODOR, OF NEWARK, NEW JERSEY, ASSIGNOR TO REINFORCED PAPER BOTTLE CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE SPINNER FOR PAPER CONTAINERS Application filed September 26, 1929, Serial No. 395,427. Renewed October 15, 1932-.

My invention relates to improvements in the method of spinning and the spinner itself for forming the crimped rim at the bottom of a bottle or container made of paper, and the object of the invention is to devise a very simple, accurate and reliable method and spinner which will efl'ectually turn the flange or bead of both the bottom and the bottom edge of the container and interlock the same in such a manner as to produce the maximum of strength fully capable of resisting any pressure to which it may be subjectcd due to the handling of the bottle.

My invention consists of the method hereinafter described and the spinner used to carry out such method coacting preferably with a collapsible mandrel, the spinner being provided with a face groove near its periphery and rollers suitably formed and journalled and set in the disc and at the base of the groove, such rollers being preferably spaced at equal distances apart and being of any desired number, all the parts coactmg and being constructed and arranged as hereinafter more particularly described and illustrated in the accompanying drawing.

Figure l is a longitudinal section through the spinner and collapsible mandrel showlng the position of the bottom end of the bottle in relation to the spinner previously to its being forced into the groove to form up the crimped rim at the bottom of the bottle or container.

Fig. 2 is a similar view showing the final position of the bottom edge of the bottle and flange of the bottom as finally upset and turned up interiorly.

Fig. 3 is a face view of the spinner, and

Fig. 4 is a longitudinal section of the spinner itself.

In the drawings like characters of reference indicate corresponding partsin the different views.

In the formation of bottles or containers made of paper, particularly designed for milk, it has always been diflicult to make the bottom edge of the bottom and its connection to the bottom edge of the bodysufliciently strong to meet the necessary resistance and prevent collapsing. Heretofore, the flange of the bottom has been inserted and held in a double inturned flange at the bottom edge of the paper container, where such container has been made of paper sheets. It has been found that this type of bottom edge or flange is not sufliciently strong and that it is necessary to provide for a double reinforcement or crimped rim.

After considerable experiment I have found it necessary not only to devise a method whereby the reinforced bottom edge or crimped rim may be successfully formed up but also a. particular type of spinner to effect this method. p

1 is the body of the container which may be formed of one or more layers of paper wrapped upon each other in cylindrical form. In the drawing 1 show merely the bottom portion of the container and such bottom portion is supported on a suitable collapsible mandrel 2 which may be of any approved construction the particular requisite of which is to hold the bottom 3 rigidly in position in proximity to the bottom edge 1 of the container. The bottom 3 has an outwardly extending flange 3 and it is the outer edge of this flange which is secured in such a position as to leave a marginal annular space between the extreme edge 1' and the extreme edge of the flange 3". This marginal space is necessary in order that its greater flexibility will permit of the combined edges being curled with facility as shown in Fig. 2, as will hereinafter appear. I

4 is the spinner proper which is suitably secured on an arbor 5. The spinner 4 is in the shape of a disc and has formed in its face opposite the collapsible mandrel an annular groove 6 the outside edge of which is of a pcriphery substantially corresponding to the outer periphery of the container. The inside peripheral edge is of such a diameter as will make the width of the groove of the right dimension to determine the thickness of the rebackwardly from the outer peripheral'face of the roove 6 so as to practically form a bevel. %n the drawing I show three rollers 7 and their corresponding parts but it will of course be understood that I may use any desired number.

Having now described the principal parts involved in my invention I shall describe the method whereby the crimped rim is formed or s un. I y --T collapsible mandrel and container there ii as well as the spinner are given the requisite relative rotation, the spinner at the same time being forced up against the bottom of the container so that the edge 1' is forced into the groove and a ainst the rollers 7 which being set on a beve as hereinbefore described turn the weakmarginal edge inwardly so that it follows the groove by which it is confined and serves likewise to cause the bottom edge of fiange 3' to correspondingly curl till it reaches the condition shown in Fig. 2 in which one curled edge is curledup within the other as clearly indicated in this fi re, and a flat bottom face 9 is produced. T is bottom edge or face makes a very stable support for the bottom of the container or bottle. M

Although I describe the rollers 7 as being inclinedly set it will be understood that they might be formed of a different shape to accomplish the end desired.

A ain, although I describe a mandrel supporting the bottom 3 in position in the container it will likewise be understood" that such bottom might be supported b other means such as by air pressure. In s ort, the parts and their precise construction and location may be varied depending upon the type of rim it is desired to produce without mg from the spirit of my invention.

What I claim as my invention is:

1. The hereindescribed means of forming a crimpedrim at the bottom cylindrical end of eparta container and the flanged bottom thereof comprising means forholding the bottom withthe flange thereof "adjacent the bottom edgeof the container securely in position, means for positioning the container, a spinner comprising a disc having a face groove mtowhich the bottom ed and the flange of the bottom are designed to be brought, means for rotating the disc, and

means situated withinand located at the base of and cooperating with the sides of the groove whereby the bottom edge of the container and the bottom edge of the flange of the bottom are given an inward turnand the ge. ofthe containerposition, means for positioning the container,

a spinner com risin a disc having a face groove into w ich t e bottom edge of the container and the flange of the bottom are designed to be brought, means for rota-tin the disc, and rollers situated at the base 0 groove and so formed and confined withm t e groove and 0 rating in connection therewith whereby t e bottom ed e of the container and the bottom edge of t e flange of thebottom are given an inward turn and formedup or spun to roduce a crimped rim.

3. The hereindescri ed means of formin a crimped rim at the bottom cylindrical en of a container and the flanged bottom thereof comprisin means for holding the bottom with the ange thereof adjacent the bottom edge of the container securely in position, means for positioning the container, a spmner comprising a disc having a face groove into which the bottdm edge of the contalner and the flange of the bottom are designed to be brought, means for rotating the disc, and rollers extending into the groove beyond the clined backwardly from the outer peripheral face to the inner peripheral face of the groove. 7 i

4. A spinner for forming up the crimped rim of a per container comprising a me having a ace groove into which the'bottom edge of the container and flange of the bottom are designed to be brought, and rollers extending into the face groove beyond the bottom edge thereof radially arran ed and journalled on pins and inclined bac wardly mner face thereof suitably journalled and infrom the outer peripheral face of the groove to the inner peripheral face.

5. A method of forming up the bottom edge of a rim of a cylindrical container, com

slsting in inserting the flan ed bottom into a the bottom end pf the contalner so that the flange of the bottom lies ad acent to but clearly within the bottom edge of the container so as to form a weak pro ectlng circumferential edge' and double ange then exerting a gradually increasing rotating pressure on such weak edge of the bottom edge of the container and at the same time circumformed up orspun to produce a crimped rim.

2. The hereindescribed means of formin a crimped rim at the bottom cylindrical en of a comtainer and the flanged bottom thereof comprising means for holdin the bottom with the flange thereof ad acent the bottom edge of the container securely in 

